One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By reviewing the USDA zone info for Blanchester you should be able to estimate when it's the best time to plant ageratum.

Planting Calendar for Ageratum

Frost tolerance for ageratum:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Ageratum require warm weather which means that you must wait until it warms up after the last frost before you can plant them.

The earliest that you can plant ageratum in Blanchester is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant ageratum and expect a good harvest is probably August. Any later than that and your ageratum may not have a chance to fully mature. You can get started a few weeks earlier by starting your ageratum indoors.

Last Frost Date

The average date of last frost is April 15 in Blanchester. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Blanchester is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Blanchester you get a frost after April 15 be ready to cover your ageratum if you have a late frost.

USDA Zone Info for Blanchester

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Blanchester

You may be interested in your other planting guides for Blanchester.